Marky421 wrote: ↑Sat Jun 18, 2022 9:22 am
So I took out the battery 2 days ago and I topped it off. It did take a couple hours to fully recharge the battery. I plugged it all back in and I still can't get it to Park or move for that matter. I can put it in D and R but no acceleration happens. It still goes to "N" when I try to park. I still can't get the door to lock from the outside. I'm kinda thinking this is some kind of "limp mode" so it can be towed? I read somewhere someone said "it took a couple power cycles" to correct the problem. Does this suggest I should top it off again? I'm kinda frustrated at this point. Prior to this I did get a "battery discharging while stopped" warning for months and I thought maybe it was because of my dashcam. Any suggestions?
As you've experienced, low 12 V system voltage can set all sorts of diagnostic trouble codes (DTC's), some of which prevent normal functionality until they're cleared. If you haven't cleared DTC's after fully charging your 12 V battery, I suggest trying that.
Also, some have reported improvement after their i3's have "slept" overnight. Various modules power down after an i3 has been shut off for a while, and when they restart, some of the problems can go away. These might be the power cycles that others have referred to rather than recharging the 12 V battery.
The "battery discharging while stopped" warning occurs when the 12 V system voltage decreases below some threshold. It doesn't always indicate a failing 12 V battery as some assume. This message was periodically displayed in our infrequently driven i3 for over a year. When it occurred, I charged its 12 V battery with a battery charger which eliminated the message for a few months. If your dash cam is always connected, I would think that would discharge the low-capacity 12 V battery significantly, maybe enough to trigger the "battery discharging while stopped" warning, especially after periods of no driving. Maybe turn off your dash cam until you solve your current problem.
2019 BMW i3 Imperial Blue Metallic, Giga World, Tech + Driving Assist, Heat Pump, 428 Wheels
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